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6
Positioning the projector
To determine where to position the projector, consider the size and shape of your
screen, the location of your power outlets, and the distance between the projector
and the rest of your equipment. Here are some general guidelines:
• Position the projector between 30 inches (.75m) and 65 inches (1.65m) from
the screen. To ensure adequate cable access, do not place the projector
within 24 inches (.61m) of a wall or other object.
• If you are installing the projector on the ceiling, we strongly recommend using
InFocus
approved ceiling mounts for proper fitting, ventilation and installation.
Refer to the installation guide that comes with the InFocus Ceiling Mount Kit
(p/n SP-CEIL-UNIV) for more information. The warranty does not cover any
damage caused by use of non-approved ceiling mount kits or by installing in an
improper location. To turn the image upside down, see “Ceiling mount” on
page 28. We recommend using an InFocus authorized ceiling mount.
• Position the projector the desired distance from the screen. The distance
fro
m the lens of the projector to the screen and the video format determine
the size of the projected image. (The throw ratio of the IN146 is 0.49:1.)
• IN146 image offset is 5% +/-2%. This means that if you have an image 40
in
ches (1 meter) tall from a table-mounted projector, the bottom of the
image will be 2 inches (5 cm) above the centerline of the lens.
40 inches
high image
bottom of image 2
inches above center
of lens
Projection angle
lens center
Table 1: Screen Size
Diagonal Screen
Size
Size of the Projected Image
Width
Projection
Dis
tance (L)
Minimum
Feet Inches Meters Inches Milimeters Meters Inches
5.9 71 1.8 60 153 0.75 30
6.7 80 2.0 64 163 0.8 33
7.5 90 2.3 72 183 0.9 37
8.3 100 2.5 80 203 1.1 41
10.0 120 3.0 96 244 1.3 50
12.5 150 3.8 120 305 1.6 62
13.0 156 4.0 133 337 1.65 65